iPad won't download apps won't go into Internet screen says this certificate has expired grandson was playing dont know what he's done

Hello ann173,

I was looking into what might be going on here, and found an article that may help this issue. It is called iOS: Troubleshooting Wi-Fi networks and connections found here http://support.apple.com/kb/ts1398.

This section in particular:

Basic troubleshooting

• Tap Settings > Wi-Fi and turn Wi-Fi off and then on again.
• Verify that you are in range of your Wi-Fi router or base station.
• Confirm that your Wi-Fi router and Cable/DSL modem are connected to power and turned on.
• Check whether other devices (portable computers, for example) are able to connect to the Wi-Fi network and access the Internet.
• Update your Wi-Fi router to the latest firmware.

  For AirPort Base Stations, refer to this article for information about firmware updates. For third-party Wi-Fi routers, check the manufacturer's website for details on updating your firmware.

• Restart your iOS device

  Hold the On/Off button until "slide to power off" appears. Slide to power off your device. When it is off, press the On/Off button to turn it back on.

If that does not quite get the internet working on the iPad, then I recommend this section down the bottom

• If you are using a public or commercial network that requires a login or subscription, see this article for more information.
• Verify that you are selecting the correct network if you are in a location with multiple Wi-Fi networks.
• Verify that the Wi-Fi network settings are correct. You can view and configure Wi-Fi settings using the following steps:
  • Tap Settings > Wi-Fi.
  • Locate the Wi-Fi network you are currently using and tap >.
• If you've verified that your settings are correct and the issue persists, try the following:
  • Tap "Forget this Network" to reset settings for this Wi-Fi network, including the password. Then try connecting to the network again.
    Note: This can be useful if you identify a network issue and want to prevent the device from automatically using this network in the future.
  • Reset network settings by tapping Settings > General > Reset > Reset Network Settings. Note: This will reset all network settings, including passwords, VPN, and APN settings.

Note: If the Wi-Fi network uses MAC address filtering, you will need to add the MAC address to the access list for the Wi-Fi router. The MAC address for your device is listed as the Wi-Fi address in Settings > General > About.

Cheers,

Sterling